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Fix: Overpass-Fallback auf kumi.systems — overpass-api.de gibt 406 zurück

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overpass-api.de und lz4.overpass-api.de blockieren die Server-IP mit 406.
OVERPASS_URLS-Liste mit Fallback: kumi → lz4 → overpass-api.de.
_fetch_overpass probiert jede Instanz, springt bei 4xx-Fehler zur nächsten.
This commit is contained in:
rene 2026-04-25 22:00:26 +02:00
parent 8d3a620275
commit 91389b9a3f
1 changed files with 24 additions and 13 deletions
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37
backend/routes/osm.py
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@ -16,9 +16,13 @@ from auth import get_current_user, get_current_user_optional as get_optional_use
logger = logging.getLogger(__name__)
router = APIRouter()
CACHE_ZOOM = 12
CACHE_DAYS = 14
OVERPASS_URL = 'https://overpass-api.de/api/interpreter'
CACHE_ZOOM = 12
CACHE_DAYS = 14
OVERPASS_URLS = [
'https://overpass.kumi.systems/api/interpreter',
'https://lz4.overpass-api.de/api/interpreter',
'https://overpass-api.de/api/interpreter',
]
# Globales Limit: max 2 gleichzeitige Overpass-Anfragen (Prewarm + User geteilt)
_overpass_sem = asyncio.Semaphore(2)
@ -64,17 +68,24 @@ def _covering_tiles(south, west, north, east, zoom):
# Overpass-Fetch + Cache
# ------------------------------------------------------------------
async def _fetch_overpass(query):
for attempt in range(3):
async with _overpass_sem:
async with httpx.AsyncClient(timeout=40) as client:
r = await client.post(OVERPASS_URL, data={'data': query})
if r.status_code != 429:
r.raise_for_status()
for url in OVERPASS_URLS:
for attempt in range(2):
try:
async with _overpass_sem:
async with httpx.AsyncClient(timeout=40) as client:
r = await client.post(url, data={'data': query})
if r.status_code == 200:
return r.json().get('elements', [])
logger.warning(f"Overpass 429 (Versuch {attempt + 1}/3)")
# Semaphore freigeben, dann warten
await asyncio.sleep(45 * (attempt + 1))
raise Exception("Overpass 429 nach 3 Versuchen")
if r.status_code == 429:
logger.warning(f"Overpass 429 {url} (Versuch {attempt + 1}/2)")
await asyncio.sleep(30 * (attempt + 1))
continue # gleiche URL nochmal
logger.warning(f"Overpass {r.status_code} {url} — nächste Instanz")
break # nächste URL
except Exception as exc:
logger.warning(f"Overpass Verbindungsfehler {url}: {exc}")
break # nächste URL
raise Exception("Alle Overpass-Instanzen fehlgeschlagen")
def _stale_tiles(poi_type, tiles):
stale = []